diff --git a/LICENSE.md b/LICENSE.md
index 142459b..1cc9d8d 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,4 +1,9 @@
-## License of the code
+# Licenses of Minetest rPlace
+
+The source codes and media used in rPlace are in different licenses. However, they are all free (as in freedom) to use.
+
+## License of the code (LGPLv2.1+)
+
     Copyright (C) 2023  1F616EMO
 
     This library is free software; you can redistribute it and/or
@@ -15,7 +20,7 @@
     License along with this library; if not, write to the Free Software
     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 
-### License of Optional HTML Viewer
+### License of HTML Viewer Utility (MIT)
 
 This license covers files found in the `utils/html_viewer` file tree.
 
@@ -41,6 +46,14 @@ This license covers files found in the `utils/html_viewer` file tree.
     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 ## License of media
-All of them are CC BY-SA 4.0 or later unless other specified.
 
-License URl: https://creativecommons.org/licenses/by-sa/4.0/
+All of them are CC BY-SA 4.0 unless other specified. The attribution shoule be "1F616EMO".
+
+License URL: <https://creativecommons.org/licenses/by-sa/4.0/>
+
+However, the following media have different license:
+
+1. `mods/rp_core/sounds/rp_nodes_pop.ogg`, `mods/rp_color_pick/sounds/rp_color_pick_suish_pop.ogg`
+    * Works from Scratch support materieals ("Choose a Sound" from editor menu).
+    * License: [Creative Commons Attribution-ShareAlike 2.0 license (CC BY-SA 2.0)](https://creativecommons.org/licenses/by-sa/2.0/)
+    * Please also see [the related Term of Use of Scratch](https://scratch.mit.edu/terms_of_use#scratch-content).
diff --git a/mods/rp_color_pick/init.lua b/mods/rp_color_pick/init.lua
index f383827..3d28f7f 100644
--- a/mods/rp_color_pick/init.lua
+++ b/mods/rp_color_pick/init.lua
@@ -21,6 +21,16 @@
 
 local S = minetest.get_translator("rp_color_pick")
 
+local function play_suish_pop(pname)
+    minetest.sound_play({
+        name = "rp_color_pick_suish_pop",
+        fade = 0,
+        gain = 0.7,
+    }, {
+        to_player = pname,
+    }, true)
+end
+
 minetest.register_on_punchnode(function(pos, node, puncher, pointed_thing)
     if not puncher:is_player() then return end
     local pname = puncher:get_player_name()
@@ -37,6 +47,7 @@ minetest.register_on_punchnode(function(pos, node, puncher, pointed_thing)
             puncher:set_wielded_item(new_equip)
             inv:add_item("main", old_wield)
 
+            play_suish_pop(pname)
             minetest.chat_send_player(pname, minetest.colorize("orange", S("Picked @1",def.description)))
         end
     end
diff --git a/mods/rp_color_pick/sounds/rp_color_pick_suish_pop.ogg b/mods/rp_color_pick/sounds/rp_color_pick_suish_pop.ogg
new file mode 100644
index 0000000..1502728
Binary files /dev/null and b/mods/rp_color_pick/sounds/rp_color_pick_suish_pop.ogg differ
diff --git a/mods/rp_core/placement.lua b/mods/rp_core/placement.lua
index 237f8e0..b881257 100644
--- a/mods/rp_core/placement.lua
+++ b/mods/rp_core/placement.lua
@@ -70,6 +70,14 @@ rp_utils.every_n_seconds(0.5, function()
     end
 end)
 
+local function play_pop(pos)
+    minetest.sound_play({
+        name = "rp_nodes_pop",
+        fade = 0,
+    }, {
+        pos = pos,
+    }, true)
+end
 
 minetest.register_on_placenode(function(pos, newnode, placer, oldnode, itemstack, pointed_thing)
     if not placer:is_player() then return true end
@@ -91,6 +99,7 @@ minetest.register_on_placenode(function(pos, newnode, placer, oldnode, itemstack
         deny[name] = nil
         deny_clear[name] = nil
     end)
+    play_pop(pos)
     return true
 end)
 
diff --git a/mods/rp_core/sounds/rp_nodes_pop.ogg b/mods/rp_core/sounds/rp_nodes_pop.ogg
new file mode 100644
index 0000000..455140e
Binary files /dev/null and b/mods/rp_core/sounds/rp_nodes_pop.ogg differ
diff --git a/mods/rp_utils/init.lua b/mods/rp_utils/init.lua
index 4263422..b7e1a0d 100644
--- a/mods/rp_utils/init.lua
+++ b/mods/rp_utils/init.lua
@@ -27,4 +27,4 @@ function rp_utils.every_n_seconds(delay, func)
         minetest.after(delay, loop)
     end
     minetest.after(1,loop)
-end
\ No newline at end of file
+end